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Apparently, any exit relay may steal some private data from HTTP requests (like auth data / cookies / credit card information), if the connection itself is not encrypted.

Does HTTPS provide a reliable protection against this? AFAIK HTTPS is vulnerable to Man-In-The-Middle attacks. Is there either a way to ensure that any particular exit node does not perform this kind of attacks or a reliable mechanics that prevents exit relays from doing that?

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use a certificate checks for your HTTPs like Perspectives Project

  • Will this help if the hacker has his own valid certificate and uses it while he's tampering with my connection? – Diligent Key Presser Mar 2 '16 at 12:09
  • @DiligentKeyPresser no it won't help him : you'll be able to know that the site is using another certificate – Alexey Vesnin Mar 2 '16 at 12:28
  • Well, seems legit. Hope SSL expiration is not causing a vulnerability in Perspectives. I will probably drill into this deeper, but later... Thank you! – Diligent Key Presser Mar 2 '16 at 13:04
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The Tor Project also does exit scanning to find exit relays who do man in the middle attacks. Exitmap is such a scanner. You can also download and run it. If you or another person finds such bad relays, please report them to Tor so that they can be banned from the network.

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